Electric switch.



G. B. THOMAS.

ELECTRIC SWITCH.

APPLICATION FILED SEPT-9. 19m.

Patented Dem. H, 19W;

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h. THOMAS, Oh BRTDOJETORT, CONNECTICUT, .hSSlElI-lhlOlt TO THE hlllThh'l'T-hlififi TlllTO COMPANY, OT JETtTJDGElPOhT, CONNECTICUT, A. CORPORATION OF OONNEOTTO'UT.

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l dlh Shllo specification t Letters Frat-cut. Patented Meet llll, llhlll'll'.m

' application filed heptemher a, tare. serial life. llhtht'r.

cl l airfield and State of Oonnecticut, have.

invented a certain new and lmproved Else tric Switch, ol which the lollowing is a specification.

lllly invention relates to electric switches and particularly to a switch-operating mechanism, the ohjiect ol my invention heto provide an efiicient mechanism which may he cheaply manulactured and readily assemhled and hy which a quiclr make and ti hrealr may he secured in the operation ol the switch,

Relerring to the accompanying drawings,

Figure l is a longitudinal section through a llush switch in which my invention is illustratively embodied;

lt ig. 2 is a section at right anglesthrough the switch mechanism alone;

l ig. 3 is a perspective ol the switchlrame;

Figs. 4 and 5 are similar views ol the portions ol the switch mechanism; and

l ig. his a side elevation ol a modified construction ot a switch hlade carrier.

ln the particular embodiment ol my invention illustrated in Figs. 1 to 5 l have shown a hush switch comprising a cupshaped hody l0 ol insulating material,

across the open lace ol which eatends a supporting har ll tapped at 12 to receive the securing screws l8 hy means oil which the same is mounted upon the hody lOi ilt is v also tapped at it to receive the short screws l5 hy which the lace plate l is held in position alter the switch has heen mounted in an outlet hon (not shown) by means ol screws passing through the end slots in; hit the corners ol thehody recesses are lormed to admit the connecting wires to hinding erahly integral with the her ll and located on opposite sides of the ring 2i,v extend downward into the switch chamher ol the base it) and term the supporting lrame lor the switch mechanism. At their inner ends the members 2d are oll'set larther apart and slots lormed therein which extend inward lrom the ofilsct shoulders 26 to all-ord an open hearing lor the switch hlade carrier 27. The latter is olyolrc shape and has at the open end ol the yoke a pair ol oppositely laced studs 28 which rest in the hottoms ol the hearing slots 25. The distance hetween the studs 28 heing slightly greater than that ol the chest portion ol the lrame 2d, the yoke may straddle the latter and the studs 28 pass ahove the shoulders 28 and into the hearing slots 25. Stop lugs 29 lormed at the inner ends ol the sides 2t limit the extent ol oscillation ol the yolre 2'?" and thus limit the throw ol the switch hlades 30 which are insulated lrom hut carried hy' the yolre and cooperate with the switch terminals 19..

To operate the yoke 2? lrom the lever 23, it provide, a connecting lever 3i prelerably lormed as shown lrom a pair ol linlrs 32 ct identical lorm each having at its outer end a stud 83 pressed. lrom the etal ol the linlr and engaging in holes 34; lormed in the opposite sides .ol the lrame. ht the inner end ol the leverrecesses 35 are struclr which engage in notches 36 cut in the margins ol the yoke har 3i, so that the movement imparted to the connecting lever is transmitted to the switch hlade" yohe. Tntermediate the ends ol the link are lormed round holes 38 to lreely receive the reduced ends 89 oil an ahutment plate d0. The latter is centrally apertured at 4-1 to permit the passage therethrough ol a guide pin d-Q around which is coiled the switch spring 4-3. The upper end cl this spring hears against the head at ol the guide pin which is pivoted at to the inner slotted end ol the operating lever 23. The latter is arranged hetween the outer ends ol the links 32 and is ol such diameter that it maintains their studs 33 seated in the hearing apertures 34- in the sides ol the lrame. To insure this lunction ol the lower end ol the lever 23, the links 32 are provided with wings l6 which extend the area ol contact and against which the lower end ol the lever hears in its eatreme positions. llnastil rat

llltl much as this engagement also serves to prevent the pivot pin 45 from escaping the lower end of the lever 23 it is unnecessary to spread the ends thereof.

The assembly of the mechanism is extremely simple. The switch yoke 27 is first slipped into position in its bearings 25. The links 31 with abutment plate 40 in position, is then arranged with its studs 33 in their bearings 34, whereupon the operating lever 23, which carries at its lower end the guide pin 32, is passed down through the bearing ring and the guide pin passed through the switch spring 43 and abutment plate 40. The spring 43 is finally placed under sufficient pressure to permit the cross pin 22 to be inserted through the lever 23 and the perforations in the ring 20 and the mechanism is completely assembled ready for adjustment in the body 10. No bolts, rivets, or other securing means are needed to hold the parts assembled, with the exception of the pin 22, the ends of which may be readily spread beyond the opposite sides of the ring 20 and the mechanism thus permanently secured with its parts in proper relationship. It is obvious that as the operating lever 23 is swung in one direction or the other on its pivot pin 22, the bearing 45 of the switch spring guide pin is swung to one side or the other of the axis of 0s cillation of the connecting lever 31 with the result that the switch spring exerts its pressure to bias the lever 31, and thus the yoke 27, first in one direction and then in the other to secure the make or break action of the switch.

In Fig. 6 I have shown a modified form of yoke in which the sides 47 thereof are connected by a rivet 48 which is engaged in the recesses 35 of the connecting lever 31 in precisely the same way as the bar 37 of the yoke previously described.

Various other modifications in detail will readily occur to those skilled in the art which do not depart from what I claim as my invention.

I claim as my invention 1. In an electric switch, a frame having substantially parallel sides, an oscillating lever comprising a pair of links arranged between and adjacent said side frames, a free pivotal connection between said links and frame, in combination with an operating lever arranged between and having a sliding engagement with said links and serving to maintain the pivotal joint between the latter and the frame.

2. In an electric switch, a frame having substantially parallel sides, an oscillating lever comprising a pair of links arranged between and adjacent said side frames, a free pivotal connection between said links and frame, in combination with an operating lever arranged between and having a sliding engagement with said links and serving to maintain the pivotal joint between the latter and the frame, said links having enlarged areas at the point of sliding engagement between the same and said operating lever.

3. In an electric switch, a frame having substantially parallel sides, an oscillating lever comprising a pair of links arranged between and adjacent said side frames, :1 free pivotal connection between said links and frame, in combination with an operating lever arranged between and having a sliding engagement with said links and serving to maintain the pivotal joint between the latter and the frame, together with a spacing plate freely engaged between said links at a point removed from that of the engagement of the operating lever therewith.

4.. In an electric switch, a frame having substantially parallel sides, an oscillating lever comprising a pair of links arranged between and adjacent said side frames, a free pivotal connection between said links and frame, in combination with an operating lever arranged between and having a sliding engagement with said links and serving to maintain the pivotal joint between the latter and the frame, together with a spacing abutment plate engaged between said links at a point removed from that of the engagement of the operating lever therewith and a switch spring operatively interposed between said bearing plate and operating lever.

5. In an electric switch, a pivoted operat ing lever, a connecting lever having an independent axis of oscillation, a switch blade carrier having a third fixed axis of oscillation, all of said axes being substantially in parallel, an operative engagement between the connecting lever and the switch blade carrier, and a switch spring engaged between the operating and connecting levers and serving to bias the latter on the actuation of the former.

6. In an electric switch, a pivoted operating lever, a connecting lever having an independent fixed axis of oscillation, a switch blade carrier having a third fixed axis of oscillation, all of said axes being substantially in parallel, an operative engagement between the connecting lever and the switch blade carrier, and a switch spring engaged between the operating and connecting levers and serving to bias the latter on the actuation of the former.

7 In an electric switch, a connecting lever pivoted at one end, a pivoted switch bla "lo carrier jointed thereto at its opposite end, all of said axes being substantially in parallel, a spring abutment intermediate the ends of said connecting lever, an operating lever, and a switch spring interposed between the t inner or letter and the spring ebntnlent on the con necting lever, tor the purpose described.

8. ln en electric switch, at pivoted opereting lever, n connecting lever hsiving en inde pendent axis of oscillation, e pivoted. switch blade carrier, ell ct earid sores being substantielly in parallel, e spring ebntrnent cerried by the connecting lever, e switch spring benring at one end egeinet eoid abutment end operetivelyconnected et its other end to the operating lever at e point shiltoble, upon the actuation of the letter, lirorn one side to theother oi the eerie ozt oecilletion ot' the connecting lever,

9. ln an electric switch, it pivoted operet ing lever, e connecting lever hevingen inde pendent eerie of oscillation, e pivoted. twitch blede cerrier, n spring ebutlnent cerried by the connecting lever, e switch spring beer 111g at one end egeinst SEtldl ebntrnent end operetively connected at its other end to the operating lever art a point shitteble, upon the actuation of the letter, from one side to the other of the axis ol oscillation oi the connecting lever end between eeid enis end the enis or the switch blade carrier, v

ln testimony whereot l halve signed my name to this specification, in the presence cit two subscribing witnesses.

GdElURGlE H, 'lflilfi htlltb, Wll'itneseee Gt W, Gooneinen, ll, Wicnnnr, 

